Grocery errands

Ever since we moved Maddie out of the infant car seat I have been trying to figure out the best way to run errands with both girls - I'm finding out the best answer is don't! I thought this looked like a good idea:

Maddie was well secured and having a great time; Anna didn't think it was so great to share "her" car. Anna had a fit when Maddie touched her steering wheel and the rest of the shopping trip was with Maddie in the car and Anna walking.

My experience at Target the next day was not much better. After five minutes in the store, Anna was falling on the floor and Maddie was trying to stand up in the cart. There's got to be an easier way :).